Drill-frame.



PATENTED JAN. 3, 1905.

H. F. MOORE.

DRILL FRAME.

APPLIGATIOK FILED MAR. 15, 1904.

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P'ATENTED JAN. 3, 1905. H. F. MOORE.

DRILL FRAME.

APPLICATION FILED MAR. 15, 1904.

2 SHEETS-SHEET 2.

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UNITED STATES Patented January 3, 1905.

HENRY F. MOORE, OF HOPKINS, MINNESOTA.

DRILL-FRAME.

SPECIFICATION forming part of Letters Patent No. 779,174, dated January 3, 1905.

Application filed March 15,1904. Serial No. 198,254.

To all whom, it may concern.-

Be it known that I, HENRY F. MOORE, of Hopkins, Hennepin county, Minnesota, have invented certain new and useful Improvements in Drill-Frames, of which the following is a specification.

The object of my invention is to provide a drill-frame wherein a pneumatic drill can be supported and easily and quickly adjusted back and forth over the surface to be drilled without moving the supporting-frame.

The invention consists generally in provid-' ing a drill-frame having a yieldingly-held yoke or cross-head.

Further, the invention consists in providing a cross-head wherein the drill is adjustable over the surface to be drilled.

Further, the invention consists in providing a frame having a head that supports the upper portion of the drill and wherein the drill is adjustable simultaneously with its adjustment in said yoke.

Further, the invention consists in various constructions and combinations, all as hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure 1 is a side elevation of a portion of a boiler, showing my invention applied thereto. Fig. 2 is an end view of the same. Fig. 3 is a view corresponding to Fig. 1 of a slightly-modified construction, the surface to be drilled being shown as flat instead of convex, as in Figs. 1 and 2. Fig. 4 is an end view of the boiler and frame shown in Fig. 3. Fig. 5 is a section on the line {I} w of Fig. 1.

In the drawings, 2 represents a boiler, cylindrical in form, upon which the drill-supporting frame is placed. This frame consists of curved brace-bars 3, thatfit the surface of the boiler and are connected at their ends by side bars 4.. Bars 5, substantially V-shaped in form, are provided at each'end of the bars 1 and secured thereto and extend in a direction substantially at right angles tothe surface to be drilled. I have shown these bars 5 each made in one piece; but it will be understood that the side sections thereof may be made independently of each other, if preferred.

Cross-bars 6 are provided above the bars 3 and spaced therefrom, and rods 7 connect the bars 3 with the outer ends of the bars 5. Upon the rods 7, which are preferably cylindrical in form, I provide coil-springs 8, resting at their inner ends upon adjustable collars 9 and engaging at their outer ends with sliding collars 10, that support parallel side bars 11 and form therewith a yielding yoke or cross-head. The collars 9 are normally fixed on their support, while the cross-head is free to move lengthwise on the rods 7, being normally separated from the collars 9 by said springs. Upon the outer ends of the bars 5 I provide a head-bar 12, that is adapted to receive a block 13, that is adjustable back and forth lengthwise of said head and is secured therein by means of a lock-nut 14.

15 is an ordinary pneumatic drill pivotally mounted on the block 13 and having a drill 16 at its lower end, carried in a spindle head or block 27, which is slidably supported between the side bars of the cross-head. By means of the lock-nut 1 1 the drill and its spindle can be secured in any desired position in the frame, and when said nut is loosened the drill can be adjusted back and forth over the surface to be drilled without changing the position of the frame thereon. As the drill enters the boiler-surface the yoke will be forced toward the surface, putting the springs 8 under tension, so that when the hole has been made the tension of the springs will aid in raising the yoke and withdrawing the drill from the hole in the boiler-surface.

Any suitable means may be provided for securing the frame to the surface to be drilled; but I provide quadrants 18 on each side of the frame, having levers 19, provided with hooks 21, that are connected, respectively, to one end of a rope 22 and a chain 23 at the other end of said rope. By manipulating these levers the rope and chain 23 can be drawn taut around the cylinder-surface of'the boiler and the frame securely locked thereon.

In Figs. 3 and 4 I have shown a slight modification in the construction of the frame to adapt it particularly for use on a flat surface. In these figures the frame consists of bars 2 L, connected at their ends to legs 25, that are preferably formed at one end to correspond to the frame above described, having connecting side bars 26 and clips 27, that secure the lower ends of the rods 7 to the bars 24. The yoke or cross-head has its ends yieldingly mounted on rods at the end of the frame and operates in a manner corresponding to the yoke above described.

The operation of the mechanism shown in Figs. 3 and 4 is substantially the same as that described; but I have shown one lever and quadrant at each end of the frame on one side connected to ropes or cables having links at their other ends, to which hooks mounted on the frame itself instead of on the lever are connected.

I claim as my invention-- 1. The combination, with a frame having a drill-supporting head and a yieldingly-mounted yoke or cross-head, said head and yoke having guideways extending lengthwise thereof and wherein the drill-spindle is adjustable back and forth, and means for securing the said frame upon the surface to be drilled.

2. The combination, with a frame having a head provided with a guideway, of a yieldinglysupported cross head also having a guideway, a block having a locking nut mounted in said head and on which block a drill-spindle is pivoted, a spindle-block supported in said cross-head and adjustable th erein, and means for locking said frame upon a boiler. 4

In witness whereof I have hereunto set my hand this 17th day of February, 190.4.

HENRY F. MOORE.

In presence of RICHARD PAUL, M. HAGERTY. 

